TidePlanet

Ko Samui today: waves, weather and sun

Thursday, October 29, 2026 · local time (GMT+7) Thu, Oct 29 · GMT+7 C · No station nearby

Today, Thursday, October 29, in Ko Samui the sun rises at 6:10 am and sets at 5:58 pm: 11 h 48 min of daylight. The moon is 87% illuminated (waning gibbous) and rises at 8:56 pm. Major solunar periods run from 1:28 am to 3:28 am and from 2:00 pm to 4:00 pm. The next spring tides arrive from November 10 to 12. The sea is smooth, with 1.5 ft waves. There's a gentle breeze from the southeast (12 mph). Drizzle, 81 °F.

Fishing

Fishing in Ko Samui today

Fishing forecast, 7 days →

Best time to fish

Solunar activity today: medium
5
Average day · 5 out of 10 2:30–4:00 pm Also 5:30–6:20 pm
  • Major period 2:00–4:00 pm
  • Steady pressure (29.88 inHg), light offshore wind (11 mph) and some swell (1.6 ft waves) to stir the water
  • Waning gibbous: a bit more activity than at the quarters

Your day at a glance

The best window, 2:30 pm to 4:00 pm, combines a major period and some swell. Also good from 5:30 pm to 6:20 pm, with sunset.

We don't show the tide for Ko Samui, so it doesn't count in the rating. How it works · Next 7 days

Beach

Beach day in Ko Samui

Beach forecast, 7 days →

Is it a beach day?

3
Poor beach day · 3 out of 10 No good beach time today.
  • Feels like 88 °F: beach weather
  • Calm for swimming: 1.6 ft waves
  • UV 7 (high): SPF 50 sunscreen
  • Water at 86 °F (very warm)
  • Cloudy (100% cloud cover)
  • Thunderstorms: get out of the water and off the beach

Thunderstorms during beach hours: get out of the water and off the sand as soon as you hear thunder.

Today, hour by hour

  • Swimming Calm · 1.6 ft

    1.6 ft waves: calm for swimming. Low rip current risk. Always follow the lifeguard's flags.

  • Water 86 °F

    Very warm: barely refreshing.

  • Sun & sunscreen UV 7 · SPF 50

    Max UV 7 (high): SPF 50 sunscreen, reapplied every 2 hours.

  • Wind 13 mph

    Moderate offshore wind (13 mph). Skip the inflatables: offshore wind carries them out to sea.

  • Tide & sand

    We don't show the tide for Ko Samui, so it doesn't count in the rating.

We don't have data on jellyfish, sargassum or beach closures: ask the lifeguard or check with the local beach authority. How it works · The next 7 days

Beaches near Ko Samui

Map: OpenFreeMap · © OpenMapTiles · © OpenStreetMap contributors

Named beaches within 6.2 mi, nearest first. Amenities from OpenStreetMap: some may be missing or out of date. View on OpenStreetMap · Add or fix on OpenStreetMap

Beaches and amenities: © OpenStreetMap contributors (ODbL).

Tides

Tides in Ko Samui

Tides in Ko Samui: not available yet

C · No station nearby

There is no tide station near Ko Samui, and we can't rely on the global tide model on this coast: for now we don't show its tide.

Meanwhile, see the tide in Ban Ao Khoei · 100 mi

The sun, moon, solunar periods and spring tides on this page do apply to this place.

Sea and waves

The sea at Ko Samui

7-day waves

Sea stateSea state: smooth

Smooth Douglas 2 · fresh breeze, Beaufort 5
Waves 1.5 ft · 3.0 s from the east-southeast (123°)
Swell 0.5 ft · 3.6 s from the east-southeast
Current 0.3 mph toward the SSW

The waves you may find

  • Most commonMost common0.8 ft
  • Significant1.5 ft
  • Highest expectedHighest3.1 ft

One wave in seven is higher than the significant height, and about 3 times a day one reaches 3.1 ft. Before heading out, expect waves of up to 3.1 ft.

Wind on the coast and offshore

On the coast 12 mph SE · gusts 28
Offshore (13 mi W)Offshore 18 mph SE · gusts 27

Offshore wind. The coast faces north and the wind blows from land out to sea: calm shore and clean waves, but watch the drift out to sea.

Offshore Hourly wind →

Wave height, next 7 daysWaves, next 7 days

Waves stay much the same all week. The biggest waves arrive on Thursday 29: 1.6 ft with a period of 3 s, from the southeast (smooth).

Water temperature

Water temperature →
Water now86.0 °F
Today 85.8–86.0 °F air: 77 / 82 °F
Satellite (2 days ago) 86.2 °F measured 0.5 mi away

Water temperature changes how fish behave: in very cold or very warm water they feed less. The water is steady these days, with no sudden changes.

Water warmer than normal for late October (+1.9 °F).

Satellite: NASA MUR (JPL MUR MEaSUREs, PO.DAAC), doi:10.5067/GHGMR-4FJ04. Sources and licenses

Water temperature →

Forecast from Open-Meteo (CC BY 4.0) with models from ECMWF, NOAA, Météo-France, DWD, Copernicus Marine and CAMS. Updated at 11:38 am (local time).

Surf

Surf in Ko Samui today

Surf hour by hour and 7 days →

Surf today

Flat
1
Flat · 1 out of 10 9:00 am–1:00 pm
  • Barely any waves (0.4 ft sets): flat
  • Light offshore wind (10 mph): it holds up and grooms the waves

It’s flat today: almost no waves reach this coast.

Surf at the shore 0.3–0.4 ft average – sets
Swell 0.5 ft 4 s · E · 2 kJ
Wind 10 mph SE · offshore
Water and wetsuit 85.8 °F Boardshorts
  • Light: First light 5:48 am · sunrise 6:10 am · sunset 5:58 pm · last light 6:20 pm
  • Tide: We don’t have a reliable tide to show here.
  • Water at 85.8 °F: boardshorts or a swimsuit and a rash guard.
  • Energy: 2 kJ · Low power

Today’s surf at a glance

The best window, 9:00 am to 1:00 pm, has light offshore wind, though with barely any waves.

An estimate for this stretch of coast, not for a specific break: every beach or reef works its own way (its tide, bottom and angle). Check it when you get there.

Follow the flags and the lifeguards, and don’t paddle out if the surf is above your level: this score is a guide, not a substitute for what you see when you get there.

How it’s calculated · Next 7 days

Diving

Diving in Ko Samui today

Diving and snorkeling, 7 days →

Diving and snorkeling today

Likely visibility: fair
9
Great day · 9 out of 10 8:30–11:30 am Also 2:30–4:30 pm and 6:30–7:30 am
  • 0.5 ft swell at 4 s from the east: barely any surge
  • Light offshore wind (10 mph)
  • 0.2 mph current toward the west-southwest, weak (model)
  • Sun high: more light underwater
Swell 0.5 ft 4 s · from the E
Likely visibility Fair Snorkeling: good
Water and suit 85.8 °F Shorty or a rash guard
Current 0.2 mph toward the WSW
  • Slack water today: none; the tide doesn't count here
  • Likely visibility: fair. Rain (2.19 in) over the last few days has stirred up the water. Based on the last 24 hours of data.
  • Water at 85.8 °F: a shorty or a rash guard.
  • Snorkeling: good, calm sea and light wind.
  • Night dive: dark from 6:20 pm. Waning gibbous (87%), rising at 8:56 pm: a bright night.

Your diving day at a glance

The best window, 8:30 am to 11:30 am, combines little swell, light wind, weak current and the sun high. Also good from 2:30 pm to 4:30 pm, with little swell, light wind and weak current. Also good from 6:30 am to 7:30 am, with little swell, light wind and weak current.

We don't have a reliable tide for Ko Samui, so slack water doesn't count in the rating.

Never dive alone and check with the local dive shop: this rating is a guide, not a substitute for a professional.

How it works · Next 7 days

Dive sites, wrecks and dive shops nearby

Map: OpenFreeMap · © OpenMapTiles · © OpenStreetMap contributors

Within 12 mi. Some may be missing or closed; marine reserves usually need a permit. Open the map on OpenStreetMap · Missing one? Add it to OpenStreetMap

Wreck and reef positions are approximate and not for navigation; a wreck’s depth runs from the top of the hull to the seabed.

Sites: © OpenStreetMap contributors (ODbL). Wrecks: EMODnet Human Activities (AND-International), from UK Hydrographic Office data, CC BY 4.0. Contains public sector information licensed under the Open Government Licence v3.0.

Weather

Weather in Ko Samui

14-day weather

Now in Ko Samui

Now 81 °F Drizzle · feels like 88 °F · 77 / 82 °F
Low / high
77 / 82 °F
Rain
1.39 in · 100%
Clouds
100%
Humidity
87%
Dew pointDew point
77 °F
Visibility
15 mi
UV indexUV
7 · high
Air qualityAir
Fair · 32
Saharan dust
No

Pressure and fishing

  • ↗ RisingRising Anglers say fish bite less for a while
  • → SteadySteady · now Anglers expect normal activity
  • ↘ FallingFalling Anglers say fish feed more before the change

Steady now (−0.00 inHg in 3 hours). It barely changes over the next 48 hours. Steady pressure: anglers expect normal activity. Fast changes, either way, tend to affect fishing.

Today, hour by hourHour by hour

Hourly weather Wind Surf

Bars: mean wind. Dashed line: gusts. Arrows point where the wind blows to.

Time 12:00 am3:00 am6:00 am9:00 am12:00 pm3:00 pm6:00 pm9:00 pm
Sky Light drizzleShowersShowersLight showersDrizzleHeavy drizzleLight drizzleLight drizzle
Temperature 79°78°78°79°82°80°79°79°
Wind (mph) 7 ESE6 SE6 ESE9 SE12 SE11 SE9 SE9 SE
Gusts 1314152129272221
Waves 1.0 ft1.0 ft1.1 ft1.3 ft1.5 ft1.6 ft1.6 ft1.4 ft
Rain 0.01 in0.15 in0.15 in0.05 in0.02 in0.05 in0.02 in0.02 in
  • 12:00 pm 82° 12 SE 1.5 ft
  • 3:00 pm 80° 11 SE 1.6 ft
  • 6:00 pm 79° 9 SE 1.6 ft
  • 9:00 pm 79° 9 SE 1.4 ft
  • 12:00 am 78° 10 SE 1.4 ft
  • 3:00 am 78° 8 SE 1.3 ft
  • 6:00 am 78° 9 SE 1.2 ft
  • 9:00 am 82° 10 SE 1.2 ft

Next 14 daysComing days

Day Sky Low / high Max wind Max wave
Today · 29 Showers 77 / 82 °F 13 mph SE 1.6 ft
Fri 30 Drizzle 78 / 84 °F 10 mph ESE 1.4 ft
Sat 31 Light showers 77 / 84 °F 12 mph ESE 1.0 ft
Sun 1 Drizzle 78 / 85 °F 8 mph E 0.7 ft
Mon 2 Light drizzle 77 / 83 °F 6 mph ENE 0.4 ft
Tue 3 Drizzle 78 / 83 °F 6 mph E 0.3 ft
Wed 4 Drizzle 78 / 85 °F 5 mph ESE 0.2 ft
Thu 5 Drizzle 77 / 83 °F 6 mph ESE 0.3 ft
Fri 6 Light drizzle 77 / 85 °F 8 mph E 0.6 ft
Sat 7 Light showers 77 / 83 °F 10 mph E 1.2 ft
Sun 8 Light showers 76 / 82 °F 10 mph E 1.4 ft
Mon 9 Light showers 76 / 80 °F 8 mph E 1.4 ft
Tue 10 Drizzle 77 / 82 °F 7 mph E 0.9 ft
Wed 11 Heavy drizzle 76 / 82 °F 7 mph E 1.2 ft
  • Fri 30 Drizzle 78° / 84° 1.4 ft
  • Sat 31 Light showers 77° / 84° 1.0 ft
  • Sun 1 Drizzle 78° / 85° 0.7 ft
  • Mon 2 Light drizzle 77° / 83° 0.4 ft
  • Tue 3 Drizzle 78° / 83° 0.3 ft
  • Wed 4 Drizzle 78° / 85° 0.2 ft
  • Thu 5 Drizzle 77° / 83° 0.3 ft
See all 14 days →

Each day comes from the best model covering this spot: regional ones first (HRRR and NBM in the U.S., AROME, ICON-EU), then ECMWF; day 16, NOAA GFS. Waves: Météo-France up to day 10, then ECMWF WAM, coarser and further offshore.

  • The models Partly agree · medium confidence: unsure about rain tomorrow. See the models →
  • Outlook Next few weeks, compared with normal: a bit warmer, normal rain and a warmer sea. See the outlook →
  • Normal Today, cooler than normal for late October (−4.7 °F; normal high: 86 °F). Climate by month →

Forecast from Open-Meteo (CC BY 4.0) with models from ECMWF, NOAA, Météo-France, DWD, Copernicus Marine and CAMS. Updated at 11:38 am (local time).

Sun

The sun in Ko Samui

Sunrise and sunset →

Sunrise and sunset

Rises 6:10 am in the ESE (103°)ESE
Sets 5:58 pm in the WSW (256°)WSW
  • First light 5:23 am
  • Full dark 6:45 pm
  • Civil dawn 5:48 am
  • Civil dusk 6:20 pm
  • Solar noon 12:04 pm (67° high)
  • Daylight 11 h 48 min (−0 min)
  • Evening golden hour 5:30 pm
  • Full dark 6:45 pm

Golden hour and the day-night map

Morning golden hour6:10–6:38 am
Evening golden hour5:30–5:58 pm
Ko Samui

Today the sun is 92,342,270 mi away and looks 32′ 11″ across.

Moon and solunar

The moon in Ko Samui

The moon for 7 days →

Moon phase and position

Waning gibbous · 87% 87% illuminated · 18.5 days old New moon on Mon, Nov 9 · 2:03 pm
Rises 8:56 pm in the ENE (62°)ENE
Sets 10:09 am tomorrow · in the WNW (298°) · set at 9:04 am
Transit 2:28 am overhead
Visible 13 h 13 min from 8:56 pm to 10:09 am

Today the moon is 226,507 mi away and looks 32′ 46″ across.

Solunar periods

Today's activity: medium
  • 1:28–3:28 am Major · the moon passes overhead · high activity
  • 2:00–4:00 pm Major · the moon passes underfoot · high activity
  • 8:34–9:34 am Minor · moonset · medium activity
  • 8:26–9:26 pm Minor · moonrise · medium activity

According to solunar theory, fish feed more when the moon passes overhead or underfoot (major periods, about 2 h) and when it rises or sets (minor periods, 1 h). It works best around new and full moon.

Upcoming moon phases

2026 moon calendar →
  • Last quarter Mon, Nov 2 · 3:29 amNov 2 in 4 days
  • New moon Mon, Nov 9 · 2:03 pmNov 9 in 11 days
  • First quarter Tue, Nov 17 · 6:48 pmNov 17 in 19 days
  • Full moon Tue, Nov 24 · 9:54 pmNov 24 in 26 days

Next perigee (the moon at its closest to Earth): October 29, 226,426 mi away.

Place

Where to fish in Ko Samui

All places in Surat Thani →

Piers, ramps and tackle shops nearby

Map: OpenFreeMap · © OpenMapTiles · © OpenStreetMap contributors

Within 9.3 mi. A spot may be missing or closed. Open the map on OpenStreetMap · Missing one? Add it to OpenStreetMap

Spots: © OpenStreetMap contributors (ODbL) and Overture Maps.

Water depth

Shallow, gradual

Shallow, gradual bottom: you need to go 1.6 mi out for 33 ft of water.

From the shoreline (0.85 mi from Ko Samui) out to sea, heading northwest.

How far from shore

  • 16 ft deep0.8 mi
  • 33 ft deep1.6 mi
  • 66 ft deepnot within 3.1 mi
  • 164 ft deepnot within 3.1 mi

For fishing, swimming and diving

  • Shore fishing. Shallow, gradual bottom (16 ft at 0.8 mi): cast far from the beach and fish the high tide, when there is more water close in.
  • Swimming. A very gentle way in with plenty of shallow water, good for kids. At low tide the water can be far out.
  • Diving. Shallow near shore: you only reach 33 ft at 1.6 mi. For dives deeper than 33 ft, go by boat.

Rough estimate: here the data comes in cells of about 0.3 mi and misses details near shore (rocks, sandbars, small coves). The profile is turned slightly from the coast so it does not run into an island or a headland.

Source: NOAA ETOPO 2022 (CC0), cells of about 0.3 mi; depth below mean sea level. For reference only: not for navigation or anchoring.

Nearest lighthouse

Ban Ang Thong 0.2 mi southwest

Light
2 flashes every 7 s; white or red depending on where you see it from · Fl(2) WR 7s
Range
15 nautical miles (17 mi)
Light height
46 ft above sea level

Light details: NGA List of Lights (USA); the rest from Wikidata. For reference only: not for navigation. Sources and licenses

Tides near Ko SamuiTides nearby

All places in Surat Thani, A to Z (42) → Ko Samui tides →

Ko Samui at a glance

  • Town or city of about 50,000 people. Coordinates: 9.536° N, 99.936° E.
  • It is 49 mi northeast of Surat Thani, the main place in Surat Thani. The sun rises 2 min earlier and sets 3 min earlier than in Surat Thani.
  • Its coast faces north.
  • Beaches and harbors nearby: Na Thon Beach (0.1 mi), Lipa Noi Beach (2.4 mi), Hat Bang Po (3.6 mi), Nudist Beach Ko Samui (3.8 mi).

Questions about Ko SamuiQuestions

What time is sunset today in Ko Samui?

At 5:58 pm. There is light until the end of civil twilight, at 6:20 pm.

What time is sunrise tomorrow in Ko Samui?

At 6:10 am. First light comes at 5:23 am.

What phase is the moon today?

Waning gibbous, 87% illuminated. New moon on Mon, Nov 9 · 2:03 pm.

When are the next spring tides?

From November 10 to 12.

What are today's solunar periods?

Major 1:28–3:28 am, Minor 8:34–9:34 am, Major 2:00–4:00 pm, Minor 8:26–9:26 pm. Today's activity is medium.

What's the weather like today in Ko Samui?

Showers, from 77 °F to 82 °F, with a gentle breeze from the southeast (12 mph) and a 100% chance of rain.

How is the sea today in Ko Samui?

Smooth (Douglas 2): 1.5 ft waves with a period of 3.0 s from the east-southeast. The water is 86.0 °F.

When is the best time to visit Ko Samui?

The best time to visit Ko Samui is in February: highs of 86 °F, about 4 rainy days a month and 8 hours of sunshine a day.

Can I use this data for navigation?

No. These are predictions for fishing and leisure; for navigation, use the official publications.

Where this data comes from

Sun and moon: our own calculation with astronomy-engine. Places: GeoNames (CC BY 4.0). Coastline: © OpenStreetMap contributors (ODbL).

Spotted a mistake? Tell us · How we calculate the tide

Settings

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Height and distance Tides, waves and distances
Temperature Air and water
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Time Tides, sun and moon
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